Throughout this work we use the phase screen simulations to model the channel.
Performing phase screen simulations is essentially a numerical approach to solving the stochastic parabolic equation, and adopts a versatile technique referred to as the split-step method [1]}.
Despite its computationally intensive nature, the split-step method has been widely used to study the atmospheric optical propagation of classical light under a variety of conditions (see e.g. [2]}, [3]}, [4]}, [5]}, [6]}, [7]}).
Due to its quantitative agreement with analytical results, the split-step method is also believed to be
very reliable (see e.g. [8]}, [9]}, [10]}).
